Finding the Fourth Proportional to 5,112.48, 7,672.82 and 2,648.00

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112.48 : 7,672.82 = 2,648.00 : x
2. Step 2: Convert to fraction form
   5,112.48/7,672.82 = 2,648.00/x
3. Step 3: Cross multiply
   5,112.48x = 7,672.82 × 2,648.00
4. Step 4: Simplify right side
   5,112.48x = 20,317,618.95
5. Step 5: Solve for x
   x = 20,317,618.95/5,112.48
6. Step 6: Final answer
   x = 3,974.12